Governor



July 24, 1928.

J. G. FAY

GOVERNOR Filed Deo. 9, 1925 2 Sheets-Sheet INVENTOR 6', Fay

July 24, 1928.. 1,617,961

J. G. FAY

GOVERNOR Filed Deo. 9, 1925 2 sheets-sheet 2 INVENTOR l MM ' ATTORNEY Patented July 24, V1928.

UNITED l"STATES v JOSEPH G. FAY, 0F SEATTLE, WASHINGr'JIOIT.k

Application filed December This invention relates to a combined speed and torque governor.

The object of the invention, generally stated, is the provision, in` power transmission mechanism, of load and speed responsive governing ldevices which will act to obviate or minimize stresses and strains due to irregularities of speed and load; and to render the mechanism temporarily inoperative to transmit power when subjected to a load inA excessof that for which the governing devices are adjusted.

More specific objects and advantages of the invention will appear in the following description.

The invention consists of the novel construction, adaptation and combination of parts hereinafter described and claimed.

In the accompanying drawings,

Figure 1 is a view in transverse section l of a governor embodying my invention; Fig.

2 is a longitudinal section taken substantially on broken line 2-2 of Fig. 1; and Fig. 3 is a view, partly in elevation and partly'in vertical section, illustrating details shown in Figs. 1 and 2. Fig. 4c is a side elevational view of the governor shown applied in power transmission mechanism including a clutch which is shown-in longitudinal section.

In carrying out my`invention, I provide two cylindrical members A and ,B disposed one Within the other, the outer member B being in the nature of a ring which is bored to receive the peripheral wall elements 5 of the inner memberA. `Said inner member, as shown in Fig. 2, is provided with a plurality of arm elements 6 which are formed integral with, or rigidly connected to, the respective wall elements' 5 and also vwith a hubk 7. 8 represents aspider element which is secured, as by means of screws 9, to said hub .and is located in spaced apart relation with the arms 6 to afford a chamber V10 interiorly of the member A.. Said inner member is secured by a key 11, or other known means, to a'shaft 12 upon which the devise is mounted.

The membersA and B are resiliently coupled with each other for relative `rotary Vmovements by means of compression springs 13, one end of each springbeingseated in a cylindrical box 14' having trunnions 15, 151 which are journaled in bearings provided, respectively, in said arms and spider thereby affording oscillatory movement to the respective box 14. The other end `of GOVERNOR.

9, 1925.' serial No. 74,254. y

each spring is seated upon the peripheral flange 16 of a ferrule 17 which is mounted upon an end of aspring-adjusting screw 1S taking in a screw threaded hole 19, one for each screw 18, provided in an7 attachment 2O of the member B. y n

The springs 13-serve as torque-governing members,- through which rotarymotion `is transmitted from themember B to the inember A. y y i For speed governing purposes I provide lat diametrically `opposite sides of the shaft 12, p airs of toggle links 22, 23, eachrpair Abeing Joined by a pivot pin 24v The complementary toggle links are provided at their connectionrwith enlarged portions to furnish a heavy body 25.

The outer end of a link 23 ispivotally connected by means of a pin 26 tothe arm and f spider elements of the member A;v

whereas the outer end of a link 22 is pivotally connected by a pin 27 with an apertured lug 201 of one ofthe attachments 20 of the member B. y

Under normal speed conditions the'springs 13, acting `through the medium of the two members A rand B, will serve to retain the toggles'in aproximately the flexed relations in which theyy arerepresented in Fig. 1. But ywhen thev rotary speed of the device is increased beyond the power of said springs y to overcome, the effective centrifugal'force acting with respect to theheavy bodies 25 causes the latter to be moved radially outward withfrespect to they axis of the device until limited by means of stops such, forexample, asscrews 28l which are vadjustably engaged in screw' threaded holes of bosses 281 of the member B. Y f v The'screws 28 are,moreover, regulated to prevent the links of the respective togglesl from beingi moved into alignment or dead centers with respect 'to each other, thereby enabling the springs 13 to flex the toggles when therotaryzspeed lof the device is diminishing sufficiently vtofreduce the centrifugal force with rrespect to the'bodies 25.V

Mounted upon the shaft 12 for movement axially thereof is a shift-able member comprising a bar 29 having transversely ararranged parallel with said shaft and having inclined cam faces31 which are disposed in substantially. helical relationtwith respect to the shaft.

ranged arms 291whose-extremities 30 are y Said'bar is arrangedto rotate in unison with the member A. In the illustrated embodiment, see Figs. 1 and 2, the means for rotatively coupling the bar 29 tothe member A is provided by prolonging two of said box trunnions, denoted by 151, to extend through apertures provided in the bar arms 291, said connection also affording guides permitting axial movement of said shiftable member.

The cam faces 31 of the extremities 30 of said bar arms are engaged by rollers 32 which are journaled upon studs 33 rigid with the member B; said cam faces and rollers being related in a manner so that when the rollers are revolved with the member B in the direction indicated by arrow X in y Fig. 1, independently of the rotative Vmovement of the member A and said bar, the rollers taking against the cam faces 31 will impart movement to the bar axially of the shaft 12, as indicated by direction arrow Y in Fig. 2.

Y Such axial movement of the bar is'effected in opposition Vto springs 34 which are interposed between said bar and washers 341 provided on the respective guides 151.

For illustrative purposes, the invention is shown in Fig. 4 as employed for regulating the transmission of power from a driving belt 40 toa driven belt 41. To which end, the member B is utilized as a pulley to receive the belt- 40, power being transmitted through the medium of springs 13 and member Ato the shaft12'and, from the latter, through the medium of clutch devices 42 to a pulley 43 about which extends the driven belt 41. ,The pulley 43, constituting one member 'of the clutch, is mounted upon the shaft'12 for independent rotation. The devices 42 constituting the other member of the' clutch, comprises a sleeve 44 splined, as at 45, to the shaft and having. link connections 46 with an expansible band 47 which is engageable with the inner peripheral surface of the rim 431 of the pulley 43.y Said link connections, arranged as shown in Fig.

' 4, are actuated to expand the band 47 into frictional engagement with the pulley 43 by a movement of the sleeve 44 in the direction indicated by arrowl W (Fig. 4), which sleeve movement is accomplished as by means of a manually operated shifting lever 48 which is fulcrumed at 49 to a suitable support and is provided with pins, such lasA 50, engaging in a circumferential slot 51 of the sleeve 44. The clutch is disengaged by contracting the band 47 through the agency of the links 46 and the sleeve 44 when an endwise movement is imparted to the latter in a direction opposite to that indicated by arrow W, actuated by the sleeve being engaged by the boss element 35 of the bar 29.

When the torque load increases beyond that for which the governor is regulated, the speed of the governor diminishes. As

this speed reduction occurs, the centrifugal force lessens with respectto the heavy bodies of the shiftable member, yor bar 29, which 'is carried by the member A, to force the shifL- able member axially of the device into itsv dotted line position 29' in Figs. 2 and 3.

This action of the rollers will be understood from Fig. 3 wherein a roller 32 is represented by full lines in its normal position, and by dotted line 32 in the position it ocesv cupies to shift the bar 29 int-o its dotted line Y position 29L due to an excessive torque, load.

The bar 29 in being t-hus thrust' out acts'.

through the mediumV of its hub 35 to impart an endwise movement to the sleeve 44 to effect the disengagement of the clutch as represented in Fig. 4.` v

The disengaging of the clutch relieves the device of its torque load whereupon the springs 13 effect relative rotative movements of the members A and B with respect to each other. Moreover, when the clutch is disengaged, releasing the governor of its torque load, the speed of the shaft 12 and the members A and B increase with a resultant increasel to the centrifugal force with respect to the heavy bodies 25 which thereupon fly outwardly, radially of the shaft 12, extending the i spread of the respective toggles 22-23 to act supplementary to thepower of the springs 13 in producing the differential movement of in Fig. 4-that is to say, away vfrom the clutch sleeve 44. p y In the illustrated example, the'clutch remains disengaged'until Vthe leve'i` 48 is ac- Y. Y

tuated to re-engage the same.

While I havev illustrated land described the application for use in disengaging a clutch to relieve the driving member' of power transmission mechanism from an overload, I do not wish toV be understood as confining myself thereto, inasmuch as my improved vgoverning devices may advantageously be employedY otherwise as, for examples, operating electrical, or mechanical,

motor shut-olf means, and for shiftingV change-speed gears. As these and otherapplications of my governing devices form no part of the invention, it is deemedunnecessary to describe and illustrate the same by drawings.

What I claim, is,-

l. A governor comprising a driving member, and a driven member disposed onewithin the other, springs providing power transmission connections between the members, toggle devices providing yielding connections between said members, said toggle devices including heavy bodies subjected to centrifugal force and cooperating with said springs to impart differential rotary movement to said members responsive to speed reductions of said members,l a shiftable member rotatively carried by the driven member, and means carried by the driving member and acting responsive to changes inv the relative speeds of the driving and driven members to actuate said means for actuating said shifting member.

2. In a governor, in combination, a driven member, a driving member, toggle devices coupling said members for relative rotary positions, springs cooperating with said toggle devices for regulating the relative rotary positions .of said members with respect to each other, heavy bodies carried by the respective toggle-devices and acting centrifugally responsive to a change in the rotary speed of both of said members to effect changes in the relative rotary positions of the members, an axially shiftable member, and means rendered .operable by diiferences in the rotary positions of the driving and driven members with respect to each other for actuating said shiftable member.

3. A governor comprising in combination two rotatable cylindrical members arranged one wit-hin the other twosets of devices connecting said members together to compel them to rotatey in unison until a predetermined torque load upon theinner member has been exceeded, one of said sets comprising a resilient element and the other set comprising pivoted means arranged to be operatively aected by centrifugal force whereby both sets may yield under pressure of said excessive torque load and permit a limited amount of differential rotation of said members, a shiftable member connected with one of said other members, and means actuated by the differential movement of said other members for operatively affecting said shifting member.

4. In a governor, the combination of a rotatable driving member and a rotatable driven member arranged one within the other and adapted to have a limited amount of independent rot-ary movement, two sets of devices connecting said members together to compel them to rotate in unison until a Apredetermined torque load at a predeten mined speedupon the driven'member has been exceeded, one of said sets comprising a spring and the other a toggle, a shiftable member connected with one of said lirst named members, and means actuated by the differential rotary movements of said first named members for operatively aiecting said shifting member.

Signed at Seattle, Washington, this 4th day of November, 1925.

JOSEPH G. FAY. 

